Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Hydraulic Analysis Using a Two-Dimensional Model(I) : Flow Analysis around Bridge Piers with Pier Shapes

2차원 모형을 이용한 수리해석(I) : 교각형상별 주변부 흐름해석

  • Kim, Eung-seok (Department of Architecture, Architectural Eng. & Civil Eng., Sunmoon University) ;
  • Lee, Seung-hyun (Department of Architecture, Architectural Eng. & Civil Eng., Sunmoon University)
  • 김응석 (선문대학교 건축사회환경학부) ;
  • 이승현 (선문대학교 건축사회환경학부)
  • Received : 2015.04.03
  • Accepted : 2015.07.16
  • Published : 2015.07.31
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Abstract

This study(I) has analyzed hydraulic characteristics with pier shapes by the bridge construction. The pier shapes are classified into total six types such as square, rhombus, octagon, oval, round, and no-piers. One-dimensional model(HEC-RAS) and two-dimensional model (RMA-2) were employed to analyze hydraulic characteristics around bridge piers. Square and rhombus shapes of piers showed velocity vectors in the upstream direction, which has a significant impact on the river bed changes by erosion and sediment transport around the piers. The flow characteristics of the oval type pier was most similar to that of no-pier situation almost without disrupting the river flow. This analysis can help to select pier types in the new bridge construction for the future.

본 연구(I)는 교량 설치에 따른 발생되는 교각 형상별 수리학적 특성을 분석하였다. 교각의 형상은 사각형, 마름모형, 팔각형, 타원형, 원형 및 교각 설치전을 포함하여 총 6가지로 구분하였으며, 1차원 모형(HEC-RAS)와 2차원 모형( RMA-2)을 적용하여 수리특성을 분석하였다. 분석결과 사각형과 마름모형의 유속 벡터가 상류방향 흐름을 보임으로 교각주위의 침식 및 유사이송으로 하상변동에 큰 영향을 미칠 것으로 판단된다. 또한, 타원형의 유속이 설치전의 유속과 가장 유사하게 산정되어 흐름의 방해가 거의 없다고 판단된다. 이러한 분석은 향후 신설 교각형상 선택시 도움을 주리라 판단된다.

Keywords

References

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